LP3874ET-5.0/NOPB National Semiconductor, LP3874ET-5.0/NOPB Datasheet - Page 13

• Manufacturer Part Number: LP3874ET-5.0/NOPB
• Description: IC REG LDO 0.8A 5.0V TO220-5
• Manufacturer: National Semiconductor

Specifications of LP3874ET-5.0/NOPB

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: Up to 7V
• Voltage - Dropout (typical): 0.24V @ 800mA
• Number Of Regulators: 1
• Current - Output: 800mA (Max)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-5 (Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Other names: *LP3874ET-5.0; *LP3874ET-5.0/NOPB; LP3874ET-5.0

Application Hints
SENSE PIN
In applications where the regulator output is not very close to
the load, LP3874 can provide better remote load regulation
using the SENSE pin. Figure 2 depicts the advantage of the
SENSE option. LP3871 regulates the voltage at the output
pin. Hence, the voltage at the remote load will be the regu-
lator output voltage minus the drop across the trace resis-
SHUTDOWN OPERATION
A CMOS Logic level signal at the shutdown ( SD) pin will
turn-off the regulator. Pin SD must be actively terminated
through a 10kΩ pull-up resistor for a proper operation. If this
(Continued)
FIGURE 2. Improving remote load regulation using LP3874
FIGURE 1. Error Flag Operation
13
tance. For example, in the case of a 3.3V output, if the trace
resistance is 100mΩ, the voltage at the remote load will be
3.22V with 0.8A of load current, I
the voltage at the sense pin. Connecting the sense pin to the
remote load will provide regulation at the remote load, as
shown in Figure 2. If the sense option pin is not required, the
sense pin must be connected to the V
pin is driven from a source that actively pulls high and low
(such as a CMOS rail to rail comparator), the pull-up resistor
is not required. This pin must be tied to Vin if not used.
20063107
LOAD
. The LP3874 regulates
20063108
OUT
pin.
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